Carbon and glass cutter.



No. 805,309. 7 PATENTED NOV. 21, 1905. J. MALOY & J. W. ABRAHAM.

CARBON AND GLASS CUTTER.

APPLICATION FILED APR. 7. 1905.

n 3 0 My w. m m mm m. 0 w/ aw a Qflitneaaesi WM 9- M UNITED STATES PATENT OFFICE.

JOHN MALOY, OF DUNBAR, AND JAMES W. ABRAHAM, OF UNIONTOVVN, PENNSYLVANIA.

CARBON AND GLASS CUTTER.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed April '7, 1905- Serial No. 254,369.

To all whom it may concern:

Be it known that we, JOHN MALoY, residing at Dunbar, and JAMES W. ABRAHAM, residing at Uniontown, in the county of Fayette and State of Pennsylvania, citizens of the United States of America, have invented certain new and useful Improvements in Carbon and Glass Cutters, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in combination cutting instruments, and more particularly to a novel form of instrument adapted for cutting sticks of carbon and rods of glass.

()ur invention aims to provide a combination instrument of a portable nature adapted to be used for cutting sticks of carbon, such as used in arc-lamps, also for cutting rods of glass, novel means being employed to gage the amount of material to be severed by the instrument.

The invention also aims to provide an instrument which will be extremely simple in construction, strong and durable, comparatively inexpensive to manufacture, and highly efficient for the purposes for which it is used.

The invention further resides in the novel construction, combination, and arrangement of parts, which will be hereinafter more fully described and then specifically pointed out in the claims, and referring to the drawings accompanying this application like numerals of reference designate corresponding parts throughout the several views, in which Figure 1 is a front elevation of our improved combination instrument. Fig. 2 is a side elevation of the same. Fig. 3 is a vertical sectional view of the instrument. Fig. A is a top plan view of our improved instrument as illustrated in Fig. 1 of the drawings. Fig. 5 is a top plan view of the instrument as illustrated in Fig. 2 of the drawings, and Fig. 6 is a horizontal sectional view taken on the line 6 6 of Fig. 3.

To put our invention into practice, we employ a tube 1, the one end of which is closed, as indicatedat 2. Adjacent to the opposite end of the tube we provide diametrically-pposed apertures 3 3, and protruding through said apertures are the pointed inwardly-extending ends 4 A of rods 5 5, said rods being suitably secured, preferably by solder, to the lower end of the tube 1. The rods 5 5 are preferably made of a resilient and substantial metal, and the pointed ends 140f the rods may be tempered and hardened to form a substantial cutting-surface, as will be presently described.

Secured to the side of the tube 1 is a substantially arc-shaped plate 6, said plate being preferably positioned upon the side of the tube 1 at right angles to the rods 5 5. The side of the tube and the plate6 are slotted, as indicated at 7, approximately from one end of the tube to the other, and in said slot is mounted a gage consisting of a detent-block 8, carrying a screw-threaded stem 9, which extends through the slot 7 and upon the screw-threaded stem is placed a thumb-nut 10. The plate 6 is graduated, preferably into inches and fractions thereof, as indicated at 11, and the detent-block 8 may be adjusted within the tube 1 by unscrewing the thumbnut 10 and moving the gage to any desired position.

Mounted parallel to the plate 6 is a rod 12, the lower end of which extends beneath the bottom of the tube 1, as indicated at 14:, and has its upwardly-bent end 15 secured by any desired means, such as solder, to the side of the tube, as indicated at 16. The opposite end of the rod 12 is bent inwardly, as indicated at 17, and bifurcated to form arms 18 18, between which is journaled a cutting or diamond wheel 19.

When it is desired to sever the end of a stick of carbon, the rods 5 5 are employed as a cutting medium, and the desired lengthof carbon to be out having been determined the gage or detent block 8 is set within the tube 1. The end of the carbon to be severed is then placed within the tube and the rods 5 5 pressed inwardly by the hand of the 'operator manipulating the instrument. When the pointed ends of the rods 5 5 engage the stick of carbon, the instrument is revolved upon the stick of carbon until an annular furrow has been made a sufiicient depth within the stick of carbon to permit of a clean break being made.

The screw-threaded stem 9 of the gage serves as a stop for gaging the length of the piece of glass to be cut by the instrument, and should the piece of glass be a rod or tube the rod 12 is moved outwardly and the piece of glass placed in engagement with the plate 6, the end of said piece of glass abutting IFO against the gage. The instrument is then revolved, the cutter or diamond Wheel 19 being held in engagement With the glass rod or tube until a sutficient annular furrow has been made in the glass to permit of the breaking of the glass tube or rod. I

It Will be apparent to those skilled in the art of cutting glass and carbon that We have provided an inexpensive instrument adapted to be used for the above-named purposes, and While We have herein described the instrument as being particularly adapted for car- 'bon and glass it is obvious that it may be used'ior other materials than these mentioned.

It will be noted that various changes may be made in the details of construction Without departing from the general spirit and scope of the invention.

What We claim, and desire to secure by Letters Patent, is-

1. An instrument of the character described comprising a tube having a closed end, said tube having apertures formed therein adjacent to the open end thereof, diametricallyopposed rods carried by said tube, the ends of said rods being bent inwardly to protrude through said apertures, a substantially areshaped plate carried by said tube and having graduations thereon, said tube and said plate being slotted, an adjustable gage mounted in slots in said tube and plate, a rod carried by said tube adjacent to said plate, and a rotary cutter-Wheel carried in the upper end of said rod, substantially as described.

2. An instrument of the character described consisting of a tube having a closed end, the opposite end of said tu be having diametricallyopposed apertures formed therein, rods carried by said tube and protruding through said apertures into said tube, a gage adjustably mounted in said tube, a rod carried by said tube directly in front of said gage, and a rotary cutter-Wheel carried by the upper end of said rod, substantially as described.

3. An instrument of the character described, consisting of a tube, said tube havingdiametrically-opposed apertures formed therein, rods carried by said tube, the upper end of said rods protruding through said apertures into said tube, a gage adjustably mounted upon said tube, and a rotary cutter-Wheel mounted outside of said tube, substantially as and for the purpose described.

4L. An instrument of the character described, consistingof a tube, an adjustable gage mounted in said tube, resilient rods carried by said tube and protruding Within the tube, and a rotary cutter-wheel mounted outside of said tube, substantially as and for the purpose set forth.

5. An instrument of the character described comprising a tube, an adjustable gage carried by said tube, resilient rods carried by the tube, and projecting Within said tube, a rod carried by said tube, and a rotary cutter-Wheel carried by the end of said rod, substantially as described.

6. An instrument for cutting rods or tubes of brittle material, comprising a tube to receive the object to be cut, and cutting members secured on the outside of the tube, and

having inturned cutting edges projecting into the tube, substantially as described.

7. An instrument for cutting tubes or rods, comprising a hollow member to receive the article to be cut, and cutter-rods mounted on the exterior Wall of said member and having inturned cutting ends projecting into the member to engage the periphery of the article being cut, substantially as described.

8. A cutting instrument of the type described, comprising a hollow member to receive the article to be cut, and having a lon gitudinal slot in its Wall, a gage adjustably mounted in said slot, and cutters carried by said member, substantially as described.

9. A cutting instrument of the type described, embodying a slotted tube, a gage adjustably mounted in the slot of said tube, a slotted arch-shaped plate carried by the tube, and cutting means supported from the tube and lying opposite the plate, substantially as described.

10. In a cutting instrument of the type described, a receiving member for the article to be cut, an adjustable gage carried by said member and forming a support for the article to be cut, and cutters carried by the receiving member adapted to engage the periphery of the article to be cut, substantially as described.

In testimony W hereof We atfix our signatures in the presence of two Witnesses.

JOHN MALOY. JAMES W. ABRAHAM.

Witnesses:

CHARLES T. CRAMER, Jos. SHEARIN. 

